1
let arr = [1,4,5,6,1,3,2,,9,9,5,7,3]
2
let noRepeat = [...new Set(arr)]

1
let arr = [1,4,5,6,1,3,2,,9,9,5,7,3]
2

3
let noRepeat = arr.filter((item,index)=>{
4
    return arr.indexOf(item) === index
5
})

1
let arr = [1,4,5,6,1,3,2,,9,9,5,7,3]
2
function noRepeat(arr) {
3
    let newArr = []
4
    for(let i=0;i<arr.length;i++){
5
        if(newArr.indexOf(arr[i]) === -1){
6
            newArr.push(arr[i])
7
        }
8
    }
9
    return newArr
10
}
11
let newArr = noRepeat(arr)

1
let arr = [1,4,5,6,1,3,2,,9,9,5,7,3]
2
function noRepeat(arr) {
3
    let newArr = []
4
    for(let i=0;i<arr.length;i++){
5
        if(!newArr.includes(arr[i])){
6
            newArr.push(arr[i])
7
        }
8
    }
9
    return newArr
10
}
11
let newArr = noRepeat(arr)

1
let map = new Map()
2
for(let item of arr){
3
    map.set(item.id,item)
4
}
5
arr = [...map.values()]

1
let newArr = [];
2
let obj = {};
3
for (var i = 0; i < arr.length; i++) {
4
   if (!obj[arr[i].key]) {
5
     newArr.push(arr[i])
6
     obj[arr[i].key] = true
7
   }
8
}

1
const obj = {}
2
arr = arr.reduce((total, next) => {
3
  obj[next.key] ? '' : obj[next.key] = true && total.push(next)
4
  return total
5
}, [])